Hot Topic: Aggressive Deceleration Fuel Shut-off

Ford plans to lead the industry in sustainability and fuel efficiency will play a central role. This Hot Topics looks at AD Fuel Shut-off and how it will contribute to reduced consumption.
What Is It?

Aggressive Deceleration Fuel Shut-off is a powertrain control module (PCM) function that helps improve vehicle fuel economy by deactivating the fuel injectors when the vehicle is decelerating or coasting and then automatically restarting when needed for acceleration or when the vehicle's speed approaches zero.

How AD Fuel Shut-off Works...
Let’s compare two similar vehicles traveling at freeway speeds and slowing for a red light or exiting the freeway. One vehicle has a traditional drivetrain, and the other with an AD Fuel Shut-off equipped drivetrain. With AD Fuel Shut-off Fuel delivery stops when the driver takes his/her foot completely off the accelerator pedal of an AD Fuel Shut-off -equipped vehicle at freeway speeds.

 The PCM completely turns off the fuel injectors. The engine continues to rotate using the transmission energy, instead of fuel, to maintain the momentum. All systems are normal while the vehicle is "coasting."
 All other powertrain, braking and electrical systems continue to function normally while the fuel delivery is stopped Fuel delivery is restored when the vehicle slows to a predefined speed or if the driver depresses the accelerator pedal.
 The PCM seamlessly turns the fuel injectors back on
Without AD Fuel Shut-off
Fuel delivery NEVER stops in a vehicle without AD Fuel Shut-off – even when the driver takes his/her foot completely off the accelerator pedal. The engine is always running even when the vehicle is coasting – which requires fuel.
Mechanical resistance from the transmission and the tires will eventually slow the vehicle if there is no braking
What it means to consumers
AD Fuel Shut-off is all about efficiency. In fact, it is estimated that it can improve fuel efficiency by 1%. Drivers may notice an AD Fuel Shut-off equipped vehicle seems to slow more quickly than a vehicle without the system. This is similar to the "engine braking effect" in a vehicle with a manual transmission.
This is completely normal and indicates AD Fuel Shut-off is maximizing fuel efficiency.

Fast Facts
AD Fuel Shut-off is a Ford technology designed to maximize fuel economy for automatic transmission-equipped drivetrains.

While AD Fuel Shut-off automatically engages, certain drivetrain conditions must first be met:
Engine and transmission must be at normal operating temperatures
Vehicle speed must exceed a specified threshold, which varies by vehicle
Transmission must be in 5th or 6th gear

2010 Ford & Lincoln Vehicles with AD Fuel Shut-off
Fusion (1)
Taurus
Escape
Edge
Flex
F-150
E-Series Van
MKS
MKT
Navigator

(1) AD Fuel Shut-off not available on Fusion Sport